1255671920 has 40 divisors (see below), whose sum is σ = 2960569440. Its totient is φ = 495192320.

The previous prime is 1255671917. The next prime is 1255671941. The reversal of 1255671920 is 291765521.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104855 + ... + 116214.

It is an arithmetic number, because the mean of its divisors is an integer number (74014236).

Almost surely, 2^1255671920 is an apocalyptic number.

1255671920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1255671920 is an abundant number, since it is smaller than the sum of its proper divisors (1704897520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1255671920 is a wasteful number, since it uses less digits than its factorization.

1255671920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221153 (or 221147 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 1255671920 is about 35435.4613346574. The cubic root of 1255671920 is about 1078.8441910283.

The spelling of 1255671920 in words is "one billion, two hundred fifty-five million, six hundred seventy-one thousand, nine hundred twenty".